A mate of mine's having a mid-life crisis and has bought an XE to stick in his Corsa
He works in an engineering shop and is grinding/reboring it himself.
The place he works deals with large commercial engines etc and not cars so he needs a source of .25 oversized main and big end bearings himself.
Where would you look ? (I'm a Ford man myself, I'd just go to Burtons)

Cheaper the better of course

Cheers

Seen them regularly come up on eBay. Just make sure they are a good make. Or SBD are vauxhall specialist.